Filter leaf support



Jan. 20, 1948. J w, LITTLE I 2,434,807

FILTER LEAF SUPPORT Filed June 12, 1946 INVENTOR. JOHN W LITTLE Patented Jan. 20,1948

UNITED STATES PATENT OFFICE FILTER LEAF SUPPORT John W. Little, Birmingham, Ala., assignor to Goslin-Birmingham Manufacturing Company, Inc., a corporation of Alabama Application June 12, 1946, Serial No. 676,158

Claims. (01. 210-181) 1 2 This invention relates toafilter of the rotating rings I 5 and I6 which bear against the filter leaf, pressure type, in which a multiplicity of cloths. Bolts I! with nuts l8 thereon extend leaves are mounted in spaced relation on a hollow through the clamping rings, the filter cloth, the shaft through which the filtrate flows and has perforated plate, and the inner mounting ring for its principal object the provision of improved 5 l2 to hold them in assembled relation. The means for securing and holding the leaves in leaves ID are held in properly spaced relation to uniform spaced relation. each other at their peripheries by means of my In filters to which my invention is particularly improved spacer bar, a plurality of which are applicable the leaves are each made up of a pair disposed about the periphery of the leaf assembly, of perforated plates, covered with filter cloth, 10 as shown in Fig. 2. separated by a coarse backing screen, and with a In it preferred embodiment, my improved solid inner mounting ring around the periphery. spacer unit comprises a flat bar 23 to which are Clamping rings bear against the sides of each welded at regular intervals on the face thereof leaf at its periphery and clamping bolts extend a plurality of angular lugs embodying flanges 2| through the assembled clamping rings, filter cloth and 24, the flanges 2| of which form between and inner mounting rings to hold them in asthem a series of notches 22 in which fit the leaves sembled relation. Heretofore, it has been the ill. The flanges 2 of e angular 1 extend practice to hold the leaves in spaced relation by inwardly between the leaves H) and serve as means of an angle bar which had one flange paddles to stir up the slurry in the filter as the notched to fit over the leaves, and with screws assembly is rotated in the filtering operation, passing through the other flange into holes in the while as shown, the bar 23 lies flat on the outer peripheral mounting rings. peripheries of the leaves l0. At uniformly spaced Difficulties have been encountered with such intervals along t e the flanges 24 0f the fastenings due to the working loose of the screws. angular lugs are bent inwardly to lie alongside Also, there is a tendency for the leaves to warp 5 the leaves. Each of the flanges 24 is provided in service and when remounting the leaves after with a bolt hole 26 through which one of the renewing the filter cloth, difiiculties are enclamping bolts 11 passes and by means of which countered in drawing the leaves to position for each leaf, at i ut p r s dra s u y entering the screws. It is accordingly the specific against the flange and held in properly spaced object of my invention to provide a spacer bar for relation with respect to adjacent leaves.

the leaves of such a filter which shall be simple, From the foregoing description, it will be seen easy to apply, even with the slightly warped that my improved spacer bar maybe formed from leaves, and which shall be held in place by means a flat bar to which are secured the angular lugs of the clamping bolts employed in assembling the forming between them the notches 22, the lugs leaves, thereby obviating the necessity for screw being secured to the bar 23 by welding or brazing and tapped holes in the peripheral mounting ring. along both of its flanges 2| and 24.

Apparatus embodying features of my invention While I have described my spacer unit in its is illustrated in the accompanying drawing, formpreferred form, it may also be formed by notching a part of this application, in which ing out the sides of an angle and welding a sep- Fig. 1 is a side view of a rotary leaf assembly 40 arate piece thereto to form the equivalent of according to my invention; flange 24. Or, it may be formed by using a die Fig. 2 is an end view thereof; to sever a section of one flange of the angle, and

Fig. 3 is a detail view showing my improved bend the same inwardly, thus forming the notch spacer bar and its connection to the filter leaf; 22 and flange 24 in one operation and from the and same piece of material.

Fig. 4 is a detail perspective view of the spacer While I have shown my invention in but one bar inverted to show the under sides thereof. form, it will be obvious to those skilled in the Referring to the drawing for a better underart that it is not so limited, but is susceptible of standing of my invention,Ishow in Fig. 1 arotary various changes and modifications, without deleaf assembly comprising a multiplicity of leaves parting from the spirit thereof, and I desire, I I) mounted upon a hollow shaft ll. Each of the therefore, that only such limitations shall be leaves Ill, as is well known, includes an inner placed thereupon as are specifically set forth in mounting ring l2, perforated meta1 plates l3, on the appended claims. opposite sides of the ring l2, filter cloths I4 super- 5 What I claim is: imposed on the metal plates l3 and clamping 1. In afilter embodying a multiplicity of leaves mounted on a rotary shaft in spaced relation and in which filter cloth is held in place on opposite sides of each leaf by means of clamping rings and bolts extending from side to side of the leaf, a spacer bar having lugs thereon for engaging the sides of the leaves, and clamping bolts for securing the lugs to the sides of the leaves.

2. In a filter embodying a multiplicity of leaves mounted on a rotary shaft in spacedrelation and in which filter cloth is held in place on opposite sides of each leaf by means of clamping rings and bolts extending from side to side of the leaf, an axially extending bar for holding the leaves in uniformly spaced relation, said bar having a flange with notches therein fitting over the leaves, the unnotched portions of the flanges extending inwardly between the leaves, a flange lying fiat against the outer peripheries of the leaves, spaced lugs on the bars extending inwardly alongside the clamping rings, and clamping bolts extending through the lugs and clamping rings to secure the leaves to the spacer bar.

3. Apparatus as set forth in claim 2 in which a plurality of said spacer bars engage the leaves at intervals around the periphery.

4. In a filter embodying a multiplicity of leaves mounted on a rotary shaft in spaced relation and in which filter cloth is held in place on opposite sides of each leaf by means of clamping rings and bolts extending from side to side of the leaf, an axially extending flat bar lying against the outer peripheries of the leaves, a plurality of angular lugs secured in spaced relation along the inner face of said bar with one flange thereof parallel to the bar and the other extending inwardly alongside the clamping rings, and clamping bolts extending through said rings and the inwardly extending flange to secure the rings to said flat bar.

5. Apparatus as set forth in claim 4 in which both flanges of the angular lugs are welded to the inner face of the axially extending bar.

JOHN W. LITTLE. 

